thermionic valve (redirected from thermionic tubes)

thermionic valve esp US and Canadian, tube

n

(Electronics) an electronic valve in which electrons are emitted from a heated rather than a cold cathode

Thesaurus

Noun

1.

thermionic valve - electronic device consisting of a system of electrodes arranged in an evacuated glass or metal envelope electron tube, thermionic tube, thermionic vacuum tube, vacuum tube, tube acorn tube - a small vacuum tube; used at high frequencies anode - a positively charged electrode by which electrons leave an electrical device cathode - a negatively charged electrode that is the source of electrons entering an electrical device circuit, electric circuit, electrical circuit - an electrical device that provides a path for electrical current to flow diode, rectifying tube, rectifying valve - a thermionic tube having two electrodes; used as a rectifier electrode - a conductor used to make electrical contact with some part of a circuit electronic device - a device that accomplishes its purpose electronically electron multiplier - a vacuum tube that amplifies a flow of electrons gas-discharge tube - a tube in which an electric discharge takes place through a gas control grid, grid - an electrode placed between the cathode and anode of a vacuum tube to control the flow of electrons through the tube klystron - an electron tube used to generate or amplify electromagnetic radiation in the microwave region by velocity modulation magnetron - a diode vacuum tube in which the flow of electrons from a central cathode to a cylindrical anode is controlled by crossed magnetic and electric fields; used mainly in microwave oscillators pentode - a thermionic tube having five electrodes plate - the positively charged electrode in a vacuum tube television pickup tube, television-camera tube - a tube that rapidly scans an optical image and converts it into electronic signals tetrode - a thermionic tube having four electrodes triode - a thermionic vacuum tube having three electrodes; fluctuations of the charge on the grid control the flow from cathode to anode which makes amplification possible X-ray tube - a vacuum tube containing a metal target onto which a beam of electrons is directed at high energy for the generation of X rays